Schedule the background dexopt job in ART Service if it should be used.

Test: atest -a CtsCompilationTestCases
Test: Build with dalvik.vm.useartservice=true
      adb shell cmd jobscheduler get-job-state android 27873780
      > waiting
      adb shell cmd jobscheduler run android 27873780
  Check logcat that artd compiles packages.
Bug: 251903639
Change-Id: Idb9117d36a163a94ce2048e8030b7071e3e9ca81